X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.diagram%2Fsrc%2Forg%2Fsimantics%2Fdiagram%2Fparticipant%2FConnectTool2.java;fp=bundles%2Forg.simantics.diagram%2Fsrc%2Forg%2Fsimantics%2Fdiagram%2Fparticipant%2FConnectTool2.java;h=4aaa717d843109cb5d92e97e925fc3dd6dfab020;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git
diff --git a/bundles/org.simantics.diagram/src/org/simantics/diagram/participant/ConnectTool2.java b/bundles/org.simantics.diagram/src/org/simantics/diagram/participant/ConnectTool2.java
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+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.diagram.participant;
+
+import java.awt.AlphaComposite;
+import java.awt.BasicStroke;
+import java.awt.Color;
+import java.awt.Composite;
+import java.awt.geom.AffineTransform;
+import java.awt.geom.Path2D;
+import java.awt.geom.Point2D;
+import java.awt.geom.Rectangle2D;
+import java.util.ArrayDeque;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Deque;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.List;
+
+import org.simantics.Simantics;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.WriteGraph;
+import org.simantics.db.common.request.UniqueRead;
+import org.simantics.db.common.request.WriteRequest;
+import org.simantics.db.common.utils.NameUtils;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.diagram.connection.RouteGraph;
+import org.simantics.diagram.connection.RouteGraphConnectionClass;
+import org.simantics.diagram.connection.RouteTerminal;
+import org.simantics.diagram.connection.rendering.arrows.PlainLineEndStyle;
+import org.simantics.diagram.content.ResourceTerminal;
+import org.simantics.diagram.stubs.DiagramResource;
+import org.simantics.diagram.synchronization.ISynchronizationContext;
+import org.simantics.diagram.synchronization.SynchronizationHints;
+import org.simantics.g2d.canvas.ICanvasContext;
+import org.simantics.g2d.canvas.impl.DependencyReflection.Dependency;
+import org.simantics.g2d.canvas.impl.DependencyReflection.Reference;
+import org.simantics.g2d.canvas.impl.SGNodeReflection.SGCleanup;
+import org.simantics.g2d.canvas.impl.SGNodeReflection.SGInit;
+import org.simantics.g2d.connection.IConnectionAdvisor;
+import org.simantics.g2d.diagram.DiagramHints;
+import org.simantics.g2d.diagram.DiagramUtils;
+import org.simantics.g2d.diagram.IDiagram;
+import org.simantics.g2d.diagram.handler.Topology.Terminal;
+import org.simantics.g2d.diagram.participant.ElementPainter;
+import org.simantics.g2d.diagram.participant.TerminalPainter;
+import org.simantics.g2d.diagram.participant.TerminalPainter.TerminalHoverStrategy;
+import org.simantics.g2d.diagram.participant.pointertool.AbstractMode;
+import org.simantics.g2d.diagram.participant.pointertool.PointerInteractor;
+import org.simantics.g2d.diagram.participant.pointertool.TerminalUtil;
+import org.simantics.g2d.diagram.participant.pointertool.TerminalUtil.TerminalInfo;
+import org.simantics.g2d.element.ElementClass;
+import org.simantics.g2d.element.ElementClasses;
+import org.simantics.g2d.element.ElementUtils;
+import org.simantics.g2d.element.IElement;
+import org.simantics.g2d.element.IElementClassProvider;
+import org.simantics.g2d.element.handler.EdgeVisuals.EdgeEnd;
+import org.simantics.g2d.element.handler.SceneGraph;
+import org.simantics.g2d.element.handler.TerminalTopology;
+import org.simantics.g2d.element.impl.Element;
+import org.simantics.g2d.elementclass.BranchPoint;
+import org.simantics.g2d.elementclass.BranchPoint.Direction;
+import org.simantics.g2d.elementclass.FlagClass;
+import org.simantics.g2d.elementclass.FlagHandler;
+import org.simantics.g2d.participant.RenderingQualityInteractor;
+import org.simantics.g2d.participant.TransformUtil;
+import org.simantics.modeling.ModelingResources;
+import org.simantics.scenegraph.INode;
+import org.simantics.scenegraph.g2d.G2DParentNode;
+import org.simantics.scenegraph.g2d.events.EventHandlerReflection.EventHandler;
+import org.simantics.scenegraph.g2d.events.KeyEvent;
+import org.simantics.scenegraph.g2d.events.KeyEvent.KeyPressedEvent;
+import org.simantics.scenegraph.g2d.events.MouseEvent;
+import org.simantics.scenegraph.g2d.events.MouseEvent.MouseButtonEvent;
+import org.simantics.scenegraph.g2d.events.MouseEvent.MouseButtonPressedEvent;
+import org.simantics.scenegraph.g2d.events.MouseEvent.MouseMovedEvent;
+import org.simantics.scenegraph.g2d.events.command.CommandEvent;
+import org.simantics.scenegraph.g2d.events.command.Commands;
+import org.simantics.scenegraph.g2d.nodes.BranchPointNode;
+import org.simantics.scenegraph.g2d.nodes.ShapeNode;
+import org.simantics.scenegraph.g2d.snap.ISnapAdvisor;
+import org.simantics.scenegraph.utils.GeometryUtils;
+import org.simantics.scenegraph.utils.Quality;
+import org.simantics.structural2.modelingRules.ConnectionJudgement;
+import org.simantics.utils.datastructures.Callback;
+import org.simantics.utils.datastructures.Pair;
+import org.simantics.utils.logging.TimeLogger;
+import org.simantics.utils.ui.ErrorLogger;
+import org.simantics.utils.ui.ExceptionUtils;
+
+/**
+ * A basic tool for making connection on diagrams.
+ *
+ * This version defines the starting, ending and route points of a connection.
+ * The routing itself is left up to the diagram router employed by
+ * {@link DiagramUtils#validateAndFix(IDiagram, ICanvasContext)}.
+ *
+ * Manual:
+ *
+ * This tool is added to the diagram when a connection sequence is initiated by
+ * another participant. PointerInteractor is one such participant which adds the
+ * tool when a terminal or non-terminal-occupied canvas space is ALT+clicked
+ * (see {@link PointerInteractor#checkInitiateConnectTool(MouseEvent, Point2D)}
+ * ). The connection will be finished when another allowed terminal is clicked
+ * upon or empty canvas space is ALT+clicked. Route points for the connection
+ * can be created by clicking around on non-terminal-occupied canvas space while
+ * connecting.
+ *
+ *
+ * Connections can be started from and ended in flags by pressing ALT while
+ * left-clicking.
+ *
+ * @author Tuukka Lehtonen
+ */
+public class ConnectTool2 extends AbstractMode {
+
+ public static final int PAINT_PRIORITY = ElementPainter.ELEMENT_PAINT_PRIORITY + 5;
+
+ @Reference
+ protected RenderingQualityInteractor quality;
+
+ @Dependency
+ protected TransformUtil util;
+
+ @Dependency
+ protected ElementPainter diagramPainter;
+
+ @Dependency
+ protected PointerInteractor pi;
+
+ /**
+ * Start element terminal of the connection. null
if connection
+ * was started from a flag or a branch point.
+ *
+ * The value is received by the constructor.
+ */
+ protected List startTerminals;
+
+ /**
+ * Refers to any of the possible overlapping start terminals. The value is
+ * taken from the first index of {@link #startTerminals} assuming that the
+ * first one is the nearest. It is null
if
+ * {@link #startTerminals} is empty.
+ */
+ protected TerminalInfo startTerminal;
+
+ protected TerminalInfo startFlag;
+
+ /**
+ * Starting position of the connection, received as an external argument.
+ */
+ protected final Point2D startPos;
+
+ /**
+ * true
if this tool should create connection continuation
+ * flags, false
otherwise.
+ */
+ protected boolean createFlags;
+
+ /**
+ *
+ */
+ protected IElementClassProvider elementClassProvider;
+
+ /**
+ *
+ */
+ protected Deque controlPoints = new ArrayDeque();
+
+ /**
+ * Contains null
when a connection is started from a new flag
+ * or one of the terminals in {@link #startTerminals} when a connection is
+ * being created starting from a terminal or possibly a set of terminals.
+ *
+ *
+ * Note that this is different from {@link #startTerminal} which simply
+ * represents the first element of {@link #startTerminals}.
+ *
+ *
+ * Only when this value and {@link #endTerminal} is properly set will a
+ * connection be created between two element terminals.
+ */
+ protected TerminalInfo selectedStartTerminal;
+
+ /**
+ * Element terminal of connection end element. null
if
+ * connection cannot be ended where it is currently being attempted to end.
+ */
+ protected TerminalInfo endTerminal;
+
+ /**
+ * The latest connectability judgment from the active
+ * {@link IConnectionAdvisor} should the connection happen between
+ * {@link #selectedStartTerminal} and {@link #endTerminal}.
+ */
+ protected ConnectionJudgement connectionJudgment;
+
+ /**
+ * If non-null during connection drawing this field tells the direction
+ * forced for the current branch point by the user through the UI commands
+ * {@link Commands#ROTATE_ELEMENT_CCW} and
+ * {@link Commands#ROTATE_ELEMENT_CW}.
+ */
+ private Direction forcedBranchPointDirection;
+
+ /**
+ * A temporary variable for use with
+ * {@link TerminalTopology#getTerminals(IElement, Collection)}.
+ */
+ protected Collection terminals = new ArrayList();
+
+ /**
+ * Previous mouse canvas position recorded by
+ * {@link #processMouseMove(MouseMovedEvent)}.
+ */
+ protected Point2D lastMouseCanvasPos = new Point2D.Double();
+
+ /**
+ * Set to true once {@link #processMouseMove(MouseMovedEvent)} has been
+ * invoked at least once. This is used to tell whether to allow creation of
+ * branch points or finising the connection in thin air. It will not be
+ * allowed if the mouse has not moved at all since starting the connection.
+ */
+ protected boolean mouseHasMoved = false;
+
+ protected TerminalHoverStrategy originalStrategy = null;
+
+ protected TerminalHoverStrategy terminalHoverStrategy = new TerminalHoverStrategy() {
+ @Override
+ public boolean highlightEnabled() {
+ return !isEndingInFlag();
+ }
+
+ @Override
+ public boolean highlight(TerminalInfo ti) {
+ boolean reflexive = isStartTerminal(ti.e, ti.t);
+ if (reflexive && !allowReflexiveConnections())
+ return false;
+
+ return canConnect(ti.e, ti.t) != null;
+ }
+ };
+
+ protected final static Composite ALPHA_COMPOSITE = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.75f);
+
+ /**
+ * Root scene graph node for all visualization performed by this tool.
+ */
+ protected G2DParentNode ghostNode;
+
+ /**
+ * Indicates whether the connection is about to be ended into a new
+ * flag/branchpoint or not.
+ */
+ protected TerminalInfo endFlag;
+
+ protected G2DParentNode endFlagNode;
+
+ /**
+ * @param startTerminal
+ * @param mouseId
+ * @param startCanvasPos
+ */
+ public ConnectTool2(TerminalInfo startTerminal, int mouseId, Point2D startCanvasPos) {
+ this(startTerminal == null ? Collections. emptyList()
+ : Collections.singletonList(startTerminal),
+ mouseId,
+ startCanvasPos);
+ }
+
+ /**
+ * @param startTerminals
+ * @param mouseId
+ * @param startCanvasPos
+ */
+ public ConnectTool2(List startTerminals, int mouseId, Point2D startCanvasPos) {
+ super(mouseId);
+
+ if (startCanvasPos == null)
+ throw new NullPointerException("null start position");
+ if (startTerminals == null)
+ throw new NullPointerException("null start terminals");
+
+ this.startPos = startCanvasPos;
+ this.lastMouseCanvasPos.setLocation(startPos);
+
+ this.startTerminals = startTerminals;
+ this.startTerminal = startTerminals.isEmpty() ? null : startTerminals.get(0);
+ }
+
+ @Override
+ public void addedToContext(ICanvasContext ctx) {
+ super.addedToContext(ctx);
+
+ if (quality != null)
+ quality.setStaticQuality(Quality.LOW);
+
+ // Force terminals to always be highlighted without pressing certain
+ // keys or key combinations.
+ originalStrategy = getHint(TerminalPainter.TERMINAL_HOVER_STRATEGY);
+ setHint(TerminalPainter.TERMINAL_HOVER_STRATEGY, terminalHoverStrategy);
+ }
+
+ @Override
+ protected void onDiagramSet(IDiagram newDiagram, IDiagram oldDiagram) {
+ if (newDiagram != null) {
+ // Get IElementClassProvider
+ ISynchronizationContext ctx = newDiagram.getHint(SynchronizationHints.CONTEXT);
+ if (ctx != null) {
+ this.elementClassProvider = ctx.get(SynchronizationHints.ELEMENT_CLASS_PROVIDER);
+ }
+
+ // See if flags should be created or not.
+ this.createFlags = Boolean.TRUE.equals(newDiagram.getHint(DiagramHints.KEY_USE_CONNECTION_FLAGS));
+ startConnection();
+ }
+ }
+
+ @Override
+ public void removedFromContext(ICanvasContext ctx) {
+ if (getHint(TerminalPainter.TERMINAL_HOVER_STRATEGY) == terminalHoverStrategy) {
+ if (originalStrategy != null)
+ setHint(TerminalPainter.TERMINAL_HOVER_STRATEGY, originalStrategy);
+ else
+ removeHint(TerminalPainter.TERMINAL_HOVER_STRATEGY);
+ }
+
+ if (quality != null)
+ quality.setStaticQuality(null);
+
+ super.removedFromContext(ctx);
+ }
+
+ protected void startConnection() {
+ Point2D startPos = (Point2D) this.startPos.clone();
+ ISnapAdvisor snapAdvisor = getHint(DiagramHints.SNAP_ADVISOR);
+ if (snapAdvisor != null)
+ snapAdvisor.snap(startPos);
+
+ // Resolve the first element and terminal of the connection.
+ ControlPoint start = new ControlPoint(startPos);
+
+ if (startTerminal != null) {
+ assert ElementUtils.peekDiagram(startTerminal.e) == diagram;
+ Point2D terminalPos = new Point2D.Double(startTerminal.posDia.getTranslateX(),
+ startTerminal.posDia.getTranslateY());
+ start.setPosition(terminalPos).setAttachedToTerminal(startTerminal);
+ } else {
+ // Create TerminalInfo describing the flag to be created.
+ if (createFlags) {
+ // This prevents connection creation from creating a branch
+ // point in place of this flag.
+ startFlag = createFlag(EdgeEnd.Begin);
+ start.setAttachedToTerminal(startFlag);
+ showElement(ghostNode, "startFlag", startFlag.e, startPos);
+ }
+ }
+ controlPoints.add(start);
+ controlPoints.add(new ControlPoint(startPos));
+
+ // Make sure that we are ending with a flag if ALT is pressed.
+ // This makes the tool always start with a flag which can be quite
+ // cumbersome and is therefore disabled. The current version will not
+ // end the connection if the mouse has not moved at all.
+ //if (keyUtil.isKeyPressed(java.awt.event.KeyEvent.VK_ALT)) {
+ // endWithoutTerminal(lastMouseCanvasPos, true);
+ //}
+ }
+
+ @SGInit
+ public void initSG(G2DParentNode parent) {
+ ghostNode = parent.addNode(G2DParentNode.class);
+ ghostNode.setZIndex(PAINT_PRIORITY);
+
+ ShapeNode pathNode = ghostNode.getOrCreateNode("path", ShapeNode.class);
+ pathNode.setColor(new Color(160, 0, 0));
+ pathNode.setStroke(new BasicStroke(2f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER, 10,
+ new float[] { 5f, 2f }, 0));
+ pathNode.setScaleStroke(true);
+ pathNode.setZIndex(0);
+
+ G2DParentNode points = ghostNode.getOrCreateNode("points", G2DParentNode.class);
+ points.setZIndex(1);
+
+ updateSG();
+ }
+
+ static class Segment {
+ public final ControlPoint begin;
+ public final ControlPoint end;
+ public Path2D path;
+
+ public Segment(ControlPoint begin, ControlPoint end) {
+ this.begin = begin;
+ this.end = end;
+ }
+
+ @Override
+ public String toString() {
+ return "Segment[begin=" + begin + ", end=" + end + ", path=" + path + "]";
+ }
+ }
+
+ private RouteTerminal addControlPoint(RouteGraph routeGraph, ControlPoint cp) {
+ TerminalInfo ti = cp.getAttachedTerminal();
+ if(ti != null && ti != startFlag && ti != endFlag) {
+ Rectangle2D bounds = ElementUtils.getElementBoundsOnDiagram(ti.e, new Rectangle2D.Double());
+ GeometryUtils.expandRectangle(bounds, 2);
+ int allowedDirections = RouteGraphConnectionClass.shortestDirectionOutOfBounds(
+ ti.posDia.getTranslateX(), ti.posDia.getTranslateY(), bounds);
+ return routeGraph.addTerminal(ti.posDia.getTranslateX(), ti.posDia.getTranslateY(),
+ bounds, allowedDirections, PlainLineEndStyle.INSTANCE);
+ }
+ else {
+ double x = cp.getPosition().getX();
+ double y = cp.getPosition().getY();
+ int allowedDirections = 0xf;
+ switch(cp.getDirection()) {
+ case Horizontal: allowedDirections = 5; break;
+ case Vertical: allowedDirections = 10; break;
+ case Any: allowedDirections = 15; break;
+ }
+ return routeGraph.addTerminal(x, y, x, y, x, y, allowedDirections);
+ }
+ }
+
+ protected void updateSG() {
+ if (controlPoints.size() != 2)
+ return;
+
+ ControlPoint begin = controlPoints.getFirst();
+ ControlPoint end = controlPoints.getLast();
+
+ RouteGraph routeGraph = new RouteGraph();
+ RouteTerminal a = addControlPoint(routeGraph, begin);
+ RouteTerminal b = addControlPoint(routeGraph, end);
+ routeGraph.link(a, b);
+
+ // Route connection segments separately
+ /*Router2 router = ElementUtils.getHintOrDefault(diagram, DiagramHints.ROUTE_ALGORITHM, TrivialRouter2.INSTANCE);
+ final List segments = toSegments(controlPoints);
+ //System.out.println("controlpoints: " + controlPoints);
+ //System.out.println("segments: " + segments);
+ router.route(new IConnection() {
+ @Override
+ public Collection extends Object> getSegments() {
+ return segments;
+ }
+
+ @Override
+ public Connector getBegin(Object seg) {
+ return getConnector(((Segment) seg).begin);
+ }
+
+ @Override
+ public Connector getEnd(Object seg) {
+ return getConnector(((Segment) seg).end);
+ }
+
+ private Connector getConnector(ControlPoint cp) {
+ Connector c = new Connector();
+ c.x = cp.getPosition().getX();
+ c.y = cp.getPosition().getY();
+
+ TerminalInfo ti = cp.getAttachedTerminal();
+ if (ti != null && (ti == startFlag || ti != endFlag)) {
+ //System.out.println("CP1: " + cp);
+ c.parentObstacle = DiagramUtils.getObstacleShape(ti.e);
+ ConnectionDirectionUtil.determineAllowedDirections(c);
+ } else {
+ //System.out.println("CP2: " + cp);
+ c.parentObstacle = GeometryUtils.transformRectangle(AffineTransform.getTranslateInstance(c.x, c.y),
+ BranchPointClass.DEFAULT_IMAGE2.getBounds());
+ c.allowedDirections = toAllowedDirections(cp.getDirection());
+ }
+
+ return c;
+ }
+
+ @Override
+ public void setPath(Object seg, Path2D path) {
+ ((Segment) seg).path = (Path2D) path.clone();
+ }
+
+ private int toAllowedDirections(BranchPoint.Direction direction) {
+ switch (direction) {
+ case Any:
+ return 0xf;
+ case Horizontal:
+ return Constants.EAST_FLAG | Constants.WEST_FLAG;
+ case Vertical:
+ return Constants.NORTH_FLAG | Constants.SOUTH_FLAG;
+ default:
+ throw new IllegalArgumentException("unrecognized direction: " + direction);
+ }
+ }
+ });
+
+ // Combine the routed paths
+ Path2D path = new Path2D.Double();
+ for (Segment seg : segments) {
+ //System.out.println("SEG: " + seg);
+ if (seg.path != null)
+ path.append(seg.path.getPathIterator(null), true);
+ }*/
+
+ Path2D path = routeGraph.getPath2D();
+
+ // Create scene graph to visualize the connection.
+ ShapeNode pathNode = ghostNode.getOrCreateNode("path", ShapeNode.class);
+ pathNode.setShape(path);
+
+ G2DParentNode points = ghostNode.getOrCreateNode("points", G2DParentNode.class);
+ HashSet unusedChildren = new HashSet(points.getNodes());
+ int i = 0;
+ for (ControlPoint cp : controlPoints) {
+ if (cp.isAttachedToTerminal())
+ continue;
+
+ String id = String.valueOf(i);
+ BranchPointNode bpn = points.getOrCreateNode(id, BranchPointNode.class);
+ bpn.setDegree(2);
+ bpn.setDirection((byte) cp.getDirection().ordinal());
+ bpn.setTransform(AffineTransform.getTranslateInstance(cp.getPosition().getX(), cp.getPosition().getY()));
+
+ ++i;
+ unusedChildren.remove(bpn);
+ }
+ for (INode unusedChild : unusedChildren)
+ points.removeNode(unusedChild);
+
+ setDirty();
+ }
+
+ private G2DParentNode showElement(G2DParentNode parent, String nodeId, IElement element, Point2D pos) {
+ return showElement(parent, nodeId, element, AffineTransform.getTranslateInstance(pos.getX(), pos.getY()));
+ }
+
+ private G2DParentNode showElement(G2DParentNode parent, String nodeId, IElement element, AffineTransform tr) {
+ G2DParentNode elementParent = parent.getOrCreateNode(nodeId, G2DParentNode.class);
+ elementParent.setTransform(tr);
+ elementParent.removeNodes();
+ for (SceneGraph sg : element.getElementClass().getItemsByClass(SceneGraph.class))
+ sg.init(element, elementParent);
+ return elementParent;
+ }
+
+ private List toSegments(Deque points) {
+ if (points.isEmpty())
+ return Collections.emptyList();
+
+ List segments = new ArrayList();
+
+ Iterator it = points.iterator();
+ ControlPoint prev = it.next();
+ while (it.hasNext()) {
+ ControlPoint next = it.next();
+ segments.add(new Segment(prev, next));
+ prev = next;
+ }
+
+ return segments;
+ }
+
+ @SGCleanup
+ public void cleanupSG() {
+ ghostNode.remove();
+ ghostNode = null;
+ }
+
+ @EventHandler(priority = 200)
+ public boolean handleCommandEvents(CommandEvent ce) {
+ if (ce.command.equals(Commands.CANCEL)) {
+ setDirty();
+ remove();
+ return true;
+ } else if (ce.command.equals(Commands.ROTATE_ELEMENT_CCW) || ce.command.equals(Commands.ROTATE_ELEMENT_CW)) {
+ return rotateLastBranchPoint(ce.command.equals(Commands.ROTATE_ELEMENT_CW));
+ }
+ return false;
+ }
+
+ @EventHandler(priority = PointerInteractor.TOOL_PRIORITY + 20)
+ public boolean handleKeyEvents(KeyEvent ke) {
+ if (ke instanceof KeyPressedEvent) {
+ // Back-space, cancel prev bend
+ if (ke.keyCode == java.awt.event.KeyEvent.VK_BACK_SPACE)
+ return cancelPreviousBend();
+ }
+
+ if (ke.keyCode == java.awt.event.KeyEvent.VK_ALT) {
+ if (createFlags) {
+ endWithoutTerminal(lastMouseCanvasPos, shouldEndWithFlag(ke instanceof KeyPressedEvent));
+ return true;
+ }
+ }
+
+ return false;
+ }
+
+ @EventHandler(priority = PointerInteractor.TOOL_PRIORITY + 20)
+ public boolean handleEvent(MouseEvent me) {
+ // Only handle events for the connection-initiating mouse
+ if (me.mouseId != mouseId)
+ return false;
+
+ if (me instanceof MouseMovedEvent)
+ return processMouseMove((MouseMovedEvent) me);
+
+ if (me instanceof MouseButtonPressedEvent)
+ return processMouseButtonPress((MouseButtonPressedEvent) me);
+
+ return false;
+ }
+
+ protected boolean processMouseMove(MouseMovedEvent me) {
+ mouseHasMoved = true;
+
+ Point2D mouseControlPos = me.controlPosition;
+ Point2D mouseCanvasPos = util.controlToCanvas(mouseControlPos, new Point2D.Double());
+
+ ISnapAdvisor snapAdvisor = getHint(DiagramHints.SNAP_ADVISOR);
+ if (snapAdvisor != null)
+ snapAdvisor.snap(mouseCanvasPos);
+
+ // Record last snapped canvas position of mouse.
+ this.lastMouseCanvasPos.setLocation(mouseCanvasPos);
+
+ if (isEndingInFlag()) {
+ endFlagNode.setTransform(AffineTransform.getTranslateInstance(mouseCanvasPos.getX(), mouseCanvasPos.getY()));
+ }
+
+ List tis = pi.pickTerminals(me.controlPosition);
+ tis = TerminalUtil.findNearestOverlappingTerminals(tis);
+ if (!tis.isEmpty() && !containsStartTerminal(tis)) {
+ //System.out.println("end terminals (" + tis.size() + "):\n" + EString.implode(tis));
+ for (TerminalInfo ti : tis) {
+ Pair canConnect = canConnect(ti.e, ti.t);
+ if (canConnect != null) {
+ connectionJudgment = canConnect.first;
+
+ if (!isEndingInFlag() || !TerminalUtil.isSameTerminal(ti, endTerminal)) {
+ if (canConnect.second != null) {
+ controlPoints.getFirst()
+ .setPosition(canConnect.second.posDia)
+ .setAttachedToTerminal(canConnect.second);
+ }
+ controlPoints.getLast()
+ .setPosition(ti.posDia)
+ .setAttachedToTerminal(ti);
+
+ selectedStartTerminal = canConnect.second;
+ endTerminal = ti;
+ }
+
+ // Make sure that we are ending with a flag if ALT is pressed
+ // and no end terminal is defined.
+ endWithoutTerminal(lastMouseCanvasPos, shouldEndWithFlag(me));
+
+ updateSG();
+ return false;
+ }
+ }
+ }
+
+ connectionJudgment = null;
+ if (isEndTerminalDefined()) {
+ // CASE: Mouse was previously on top of a valid terminal to end
+ // the connection. Now the mouse has been moved where there is
+ // no longer a terminal to connect to.
+ //
+ // => Disconnect the last edge segment from the previous
+ // terminal, mark endElement/endTerminal non-existent
+ // and connect the disconnected edge to a new branch point.
+
+ controlPoints.getLast()
+ .setPosition(mouseCanvasPos)
+ .setDirection(calculateCurrentBranchPointDirection())
+ .setAttachedToTerminal(null);
+
+ endTerminal = null;
+ } else {
+ // CASE: Mouse was not previously on top of a valid ending
+ // element terminal.
+ //
+ // => Move and re-orient last branch point.
+
+ controlPoints.getLast()
+ .setPosition(mouseCanvasPos)
+ .setDirection(calculateCurrentBranchPointDirection());
+ }
+
+ // Make sure that we are ending with a flag if ALT is pressed and no end
+ // terminal is defined.
+ endWithoutTerminal(lastMouseCanvasPos, shouldEndWithFlag(me));
+
+ updateSG();
+
+ return false;
+ }
+
+ protected boolean processMouseButtonPress(MouseButtonPressedEvent e) {
+ MouseButtonEvent me = e;
+
+ // Do nothing before the mouse has moved at least a little.
+ // This prevents the user from ending the connection right where
+ // it started.
+ if (!mouseHasMoved)
+ return true;
+
+ if (me.button == MouseEvent.LEFT_BUTTON) {
+ Point2D mouseControlPos = me.controlPosition;
+ Point2D mouseCanvasPos = util.getInverseTransform().transform(mouseControlPos, new Point2D.Double());
+
+ ISnapAdvisor snapAdvisor = getHint(DiagramHints.SNAP_ADVISOR);
+ if (snapAdvisor != null)
+ snapAdvisor.snap(mouseCanvasPos);
+
+ // Clicked on an allowed end terminal. End connection & end mode.
+ if (isEndTerminalDefined()) {
+ createConnection();
+ remove();
+ return true;
+ } else {
+ // Finish connection in thin air only if the
+ // connection was started from a valid terminal.
+ if (me.hasAnyModifier(MouseEvent.ALT_MASK | MouseEvent.ALT_GRAPH_MASK) && !startTerminals.isEmpty()) {
+ Pair pair = canConnect(null, null);
+ if (pair != null) {
+ connectionJudgment = (ConnectionJudgement) pair.first;
+ selectedStartTerminal = pair.second;
+// endFlag = createFlag(EdgeEnd.End);
+// controlPoints.getLast().setAttachedToTerminal(endFlag);
+ createConnection();
+ setDirty();
+ remove();
+ } else {
+ // Inform the user why connection couldn't be created.
+ String tmsg = terminalsToString(startTerminals);
+ ErrorLogger.defaultLogWarning("Can't resolve connection type for new connection when starting from one of the following terminals:\n" + tmsg, null);
+ }
+ return true;
+ } else if (routePointsAllowed()
+ && (me.stateMask & (MouseEvent.ALT_MASK | MouseEvent.SHIFT_MASK | MouseEvent.CTRL_MASK)) == 0) {
+ // Add new connection control point.
+ controlPoints.add(newControlPointWithCalculatedDirection(mouseCanvasPos));
+ resetForcedBranchPointDirection();
+ updateSG();
+ }
+ }
+
+ // Eat the event to prevent other participants from doing
+ // incompatible things while in this connection mode.
+ return true;
+ } else if (me.button == MouseEvent.RIGHT_BUTTON) {
+ return cancelPreviousBend();
+ }
+
+ return false;
+ }
+
+ protected boolean cancelPreviousBend() {
+ if (!routePointsAllowed())
+ return false;
+
+ // Just to make this code more comprehensible, prevent an editing
+ // case that requires ugly code to work.
+ if (isEndingInFlag())
+ return true;
+
+ // If there are no real route points, cancel whole connection.
+ if (controlPoints.size() <= 2) {
+ setDirty();
+ remove();
+ return true;
+ }
+
+ // Cancel last bend
+ controlPoints.removeLast();
+ controlPoints.getLast().setPosition(lastMouseCanvasPos);
+ resetForcedBranchPointDirection();
+
+ updateSG();
+ return true;
+ }
+
+ /**
+ * Rotates the last branch point in the created connection in either
+ * clockwise or counter-clockwise direction as a response to a user
+ * interaction.
+ *
+ *
+ * At the same time it use {@link #forcedBranchPointDirection} to mark the
+ * current last branch point to be forcefully oriented according to the
+ * users wishes instead of calculating a default value for the orientation
+ * from the routed connection path. See
+ * {@link #calculateCurrentBranchPointDirection()} for more information on
+ * this.
+ *
+ *
+ * The logic of this method goes as follows:
+ *
+ * - Calculate the current branch point direction
+ * - If the branch point direction is currently user selected (
+ * {@link #forcedBranchPointDirection}
+ *
+ *
+ *
+ *
+ * @param clockwise
+ * @return true
if the rotation was successful
+ */
+ protected boolean rotateLastBranchPoint(boolean clockwise) {
+ Direction oldDir = calculateCurrentBranchPointDirection();
+
+ if (forcedBranchPointDirection == null) {
+ forcedBranchPointDirection = oldDir.toggleDetermined();
+ } else {
+ forcedBranchPointDirection = clockwise ? oldDir.cycleNext() : oldDir.cyclePrevious();
+ }
+
+ controlPoints.getLast().setDirection(forcedBranchPointDirection);
+
+ updateSG();
+
+ return true;
+ }
+
+ /**
+ * Set preferred direction for a branch/route point element.
+ *
+ * @param branchPoint the element to set the direction for
+ * @param direction the direction to set
+ * @return
+ */
+ protected void setDirection(IElement branchPoint, Direction direction) {
+ branchPoint.getElementClass().getSingleItem(BranchPoint.class).setDirectionPreference(branchPoint, direction);
+ }
+
+ protected Direction forcedBranchPointDirection() {
+ return forcedBranchPointDirection;
+ }
+
+ protected void resetForcedBranchPointDirection() {
+ forcedBranchPointDirection = null;
+ }
+
+ protected void forceBranchPointDirection(Direction direction) {
+ forcedBranchPointDirection = direction;
+ }
+
+ /**
+ * @return
+ */
+ protected Direction calculateCurrentBranchPointDirection() {
+ // If this is not the first branch point, toggle direction compared to
+ // last.
+ if (forcedBranchPointDirection != null)
+ return forcedBranchPointDirection;
+
+ if (controlPoints.size() > 2) {
+ // This is not the first edge segment, toggle route point
+ // directions.
+ Iterator it = controlPoints.descendingIterator();
+ it.next();
+ ControlPoint secondLastCp = it.next();
+
+ Direction dir = secondLastCp.getDirection();
+ switch (dir) {
+ case Horizontal:
+ return Direction.Vertical;
+ case Vertical:
+ return Direction.Horizontal;
+ case Any:
+ }
+ }
+
+ // If this is the first branch point, calculate based on edge segment
+ // angle.
+ if (controlPoints.size() > 1) {
+ Iterator it = controlPoints.descendingIterator();
+ ControlPoint last = it.next();
+ ControlPoint secondLast = it.next();
+
+ double angle = Math.atan2(Math.abs(last.getPosition().getY() - secondLast.getPosition().getY()),
+ Math.abs(last.getPosition().getX() - secondLast.getPosition().getX()));
+
+ if (angle >= 0 && angle < Math.PI / 4) {
+ return Direction.Horizontal;
+ } else if (angle > Math.PI / 4 && angle <= Math.PI / 2) {
+ return Direction.Vertical;
+ }
+ }
+
+ return Direction.Any;
+ }
+
+ protected boolean isEndingInFlag() {
+ return endFlag != null;
+ }
+
+ protected void endWithoutTerminal(Point2D mousePos, boolean altDown) {
+ // Just go with branch points if flags are not allowed.
+ if (!createFlags)
+ return;
+
+ boolean endTerminalDefined = isEndTerminalDefined();
+
+ if (altDown) {
+ if (!isEndingInFlag()) {
+ endFlag = createFlag(EdgeEnd.End);
+ endFlagNode = showElement(ghostNode, "endFlag", endFlag.e, mousePos);
+ controlPoints.getLast()
+ .setDirection(calculateCurrentBranchPointDirection())
+ .setAttachedToTerminal(endFlag);
+
+ // TerminalPainter must refresh
+ setHint(TerminalPainter.TERMINAL_HOVER_STRATEGY, terminalHoverStrategy);
+
+ updateSG();
+ }
+ } else {
+ if (isEndingInFlag()) {
+ // Currently ending with flag but ALT is no longer down
+ // so that flag must be removed.
+ endFlag = null;
+ endFlagNode.remove();
+ endFlagNode = null;
+
+ ControlPoint cp = controlPoints.getLast();
+ cp.setDirection(calculateCurrentBranchPointDirection())
+ .setAttachedToTerminal(endTerminal);
+
+ if (endTerminalDefined) {
+ cp.setPosition(endTerminal.posDia);
+ } else {
+ cp.setPosition(mousePos);
+ }
+
+ // Force TerminalPainter refresh
+ setHint(TerminalPainter.TERMINAL_HOVER_STRATEGY, terminalHoverStrategy);
+
+ updateSG();
+ }
+ }
+ }
+
+ protected void createConnection() {
+ createConnection(
+ this.selectedStartTerminal,
+ this.endTerminal,
+ this.connectionJudgment,
+ this.controlPoints);
+ }
+
+ protected void createConnection(
+ final TerminalInfo startTerminal,
+ final TerminalInfo endTerminal,
+ final ConnectionJudgement judgement,
+ final Deque controlPoints)
+ {
+ TimeLogger.resetTimeAndLog(getClass(), "createConnection");
+ if (judgement == null) {
+ // Inform the user why connection couldn't be created.
+ String tmsg = terminalsToString(Arrays.asList(startTerminal, endTerminal));
+ ErrorLogger.defaultLogError("Cannot create connection, no judgment available on connection validity when connecting the terminals:\n" + tmsg, null);
+ return;
+ }
+
+ final ConnectionBuilder builder = new ConnectionBuilder(this.diagram);
+
+ Simantics.getSession().asyncRequest(new WriteRequest() {
+ @Override
+ public void perform(WriteGraph graph) throws DatabaseException {
+ builder.create(graph, judgement, controlPoints, startTerminal, endTerminal);
+ }
+ }, new Callback() {
+ @Override
+ public void run(DatabaseException parameter) {
+ if (parameter != null)
+ ExceptionUtils.logAndShowError(parameter);
+ }
+ });
+ }
+
+ /**
+ * @param canvasPos
+ * @return
+ */
+ protected ControlPoint newControlPointWithCalculatedDirection(Point2D canvasPos) {
+ return new ControlPoint(canvasPos, calculateCurrentBranchPointDirection());
+ }
+
+ /**
+ * @param e
+ * @param t
+ * @return true
if the specified element terminal matches any
+ * TerminalInfo in {@link #startTerminals}
+ */
+ protected boolean isStartTerminal(IElement e, Terminal t) {
+ if (startTerminal == null)
+ return false;
+ for (TerminalInfo st : startTerminals) {
+ if (st.e == e && st.t == t) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ /**
+ * @param e
+ * @param t
+ * @return true
if the specified element terminal matches any
+ * TerminalInfo in {@link #startTerminals}
+ */
+ protected boolean containsStartTerminal(List tis) {
+ if (startTerminal == null)
+ return false;
+ for (TerminalInfo st : startTerminals) {
+ for (TerminalInfo et : tis) {
+ if (st.e == et.e && st.t == et.t) {
+ return true;
+ }
+ }
+ }
+ return false;
+ }
+
+ protected static FlagClass.Type endToFlagType(EdgeEnd end) {
+ switch (end) {
+ case Begin:
+ return FlagClass.Type.In;
+ case End:
+ return FlagClass.Type.Out;
+ default:
+ throw new IllegalArgumentException("unrecognized edge end: " + end);
+ }
+ }
+
+ protected TerminalInfo createFlag(EdgeEnd connectionEnd) {
+ ElementClass flagClass = elementClassProvider.get(ElementClasses.FLAG);
+ IElement e = Element.spawnNew(flagClass);
+
+ e.setHint(FlagClass.KEY_FLAG_TYPE, endToFlagType(connectionEnd));
+ e.setHint(FlagClass.KEY_FLAG_MODE, FlagClass.Mode.Internal);
+
+ TerminalInfo ti = new TerminalInfo();
+ ti.e = e;
+ ti.t = ElementUtils.getSingleTerminal(e);
+ ti.posElem = TerminalUtil.getTerminalPosOnElement(e, ti.t);
+ ti.posDia = TerminalUtil.getTerminalPosOnDiagram(e, ti.t);
+
+ return ti;
+ }
+
+ protected boolean shouldEndWithFlag(MouseEvent me) {
+ return shouldEndWithFlag( me.hasAnyModifier(MouseEvent.ALT_MASK | MouseEvent.ALT_GRAPH_MASK) );
+ }
+
+ protected boolean shouldEndWithFlag(boolean altPressed) {
+ return altPressed && !isEndTerminalDefined() && createFlags && startFlag == null;
+ }
+
+ protected boolean isEndTerminalDefined() {
+ return endTerminal != null;
+ }
+
+ protected boolean isFlagTerminal(TerminalInfo ti) {
+ return ti.e.getElementClass().containsClass(FlagHandler.class);
+ }
+
+ protected boolean allowReflexiveConnections() {
+ return false;
+ }
+
+ protected boolean routePointsAllowed() {
+ return Boolean.TRUE.equals(diagram.getHint(DiagramHints.KEY_ALLOW_ROUTE_POINTS));
+ }
+
+ /**
+ * @param endElement
+ * @param endTerminal
+ * @return
+ */
+ @SuppressWarnings("unchecked")
+ protected final Pair canConnect(IElement endElement, Terminal endTerminal) {
+ IConnectionAdvisor advisor = diagram.getHint(DiagramHints.CONNECTION_ADVISOR);
+ Object judgement = canConnect(advisor, endElement, endTerminal);
+ if (judgement == null)
+ return null;
+ if (judgement instanceof Pair, ?>)
+ return (Pair) judgement;
+ return Pair.make((ConnectionJudgement) judgement, startTerminal);
+ }
+
+ protected Object canConnect(IConnectionAdvisor advisor, IElement endElement, Terminal endTerminal) {
+ if (advisor == null)
+ return Pair.make(ConnectionJudgement.CANBEMADELEGAL, startTerminal);
+ if (startTerminals.isEmpty()) {
+ ConnectionJudgement obj = (ConnectionJudgement) advisor.canBeConnected(null, null, null, endElement, endTerminal);
+ return obj != null ? Pair.make(obj, null) : null;
+ }
+ for (TerminalInfo st : startTerminals) {
+ ConnectionJudgement obj = (ConnectionJudgement) advisor.canBeConnected(null, st.e, st.t, endElement, endTerminal);
+ if (obj != null) {
+ return Pair.make(obj, st);
+ }
+ }
+ return null;
+ }
+
+ /**
+ * For generating debugging information of what was attempted by the user
+ * when a connection couldn't be created.
+ *
+ * @param ts
+ * @return
+ */
+ private String terminalsToString(final Iterable ts) {
+ try {
+ return Simantics.sync(new UniqueRead() {
+ @Override
+ public String perform(ReadGraph graph) throws DatabaseException {
+ DiagramResource DIA = DiagramResource.getInstance(graph);
+ ModelingResources MOD = ModelingResources.getInstance(graph);
+ StringBuilder sb = new StringBuilder();
+ boolean first = true;
+ for (TerminalInfo ti : ts) {
+ if (!first)
+ sb.append("\n");
+ first = false;
+ sb.append("element ");
+ Object o = ElementUtils.getObject(ti.e);
+ if (o instanceof Resource) {
+ Resource er = (Resource) o;
+ Resource cer = graph.getPossibleObject(er, MOD.ElementToComponent);
+ Resource r = cer != null ? cer : er;
+ sb.append(NameUtils.getSafeName(graph, r)).append(" : ");
+ for (Resource type : graph.getPrincipalTypes(r)) {
+ sb.append(NameUtils.getSafeName(graph, type, true));
+ }
+ } else {
+ sb.append(ti.e.toString());
+ }
+ sb.append(", terminal ");
+ if (ti.t instanceof ResourceTerminal) {
+ Resource tr = ((ResourceTerminal) ti.t).getResource();
+ Resource cp = graph.getPossibleObject(tr, DIA.HasConnectionPoint);
+ Resource r = cp != null ? cp : tr;
+ sb.append(NameUtils.getSafeName(graph, r, true));
+ } else {
+ sb.append(ti.t.toString());
+ }
+ }
+ return sb.toString();
+ }
+ });
+ } catch (DatabaseException e) {
+ return e.getMessage();
+ }
+ }
+
+}
\ No newline at end of file